Arduino code for driving a brushless ESC based on values received over the serial port.

brushless_tester.ino

#include <Arduino.h>
#include <Servo.h>

static const int PROP_PIN = 9;
Servo brushless;

void setup() {
    Serial.begin(9600);
    brushless.attach(PROP_PIN);
    brushless.writeMicroseconds(0); //set initial value, check your manual
    Serial.println("Ready to receive commands");
}

void loop() {
    if(Serial.available()) {
        long value = Serial.parseInt();
        brushless.writeMicroseconds(value);
        Serial.print("Set PWM to ");
        Serial.print(value);
        Serial.println("ms");
    }
}